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Want kids who are smarter and thinner? Keep them away from the television set as toddlers. A shocking study from child experts at the Université de Montréal, the Sainte-Justine University Hospital Research Center and the University of Michigan, published in the Archives of Pediatrics & Adolescent Medicine, has found that television exposure at age two forecasts negative consequences for kids, ranging from poor school adjustment to unhealthy habits.

“We found every additional hour of TV exposure among toddlers corresponded to a future decrease in classroom engagement and success at math, increased victimization by classmates, have a more sedentary lifestyle, higher consumption of junk food and, ultimately, higher body mass index,” says lead author Dr. Linda S. Pagani, a psychosocial professor at the Université de Montréal and researcher at the Sainte-Justine University Hospital Research Center.

The goal of the study was to determine the impact of TV exposure at age 2 on future academic success, lifestyle choices and general well being among children. “Between the ages of two and four, even incremental exposure to television delayed development,” says Dr. Pagani.

A total of 1,314 kids took part in the investigation, which was part of the Quebec Longitudinal Study of Child Development Main Exposure. Parents were asked to report how much TV their kids watched at 29 months and at 53 months in age. Teachers were asked to evaluate academic, psychosocial and health habits, while body mass index (BMI) was measured at 10 years old.

“Early childhood is a critical period for brain development and formation of behaviour,” warns Dr. Pagani. “High levels of TV consumption during this period can lead to future unhealthy habits. Despite clear recommendations from the American Academy of Pediatrics suggesting less than two hours of TV per day — beyond the age of two — parents show poor factual knowledge and awareness of such existing guidelines.”

According to the investigation, watching too much TV as toddlers later forecasted:

a seven percent decrease in classroom engagement;

a six percent decrease in math achievement (with no harmful effects on later reading);

a 10 percent increase in victimization by classmates (peer rejection, being teased, assaulted or insulted by other students);

a 13 percent decrease in weekend physical activity;

a nine percent decrease in general physical activity;

a none percent higher consumption of soft drinks;

a 10 percent peak in snacks intake;

a five percent increase in BMI.

“Although we expected the impact of early TV viewing to disappear after seven and a half years of childhood, the fact that negative outcomes remained is quite daunting,” says Dr. Pagani. “Our findings make a compelling public health argument against excessive TV viewing in early childhood and for parents to heed guidelines on TV exposure from the American Academy of Pediatrics.”

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Since TV exposure encourages a sedentary lifestyle, Dr. Pagani says, television viewing must be curbed for toddlers to avoid the maintenance of passive mental and physical habits in later childhood: “Common sense would have it that TV exposure replaces time that could be spent engaging in other developmentally enriching activities and tasks which foster cognitive, behavioral, and motor development.”

“What’s special about this study is how it confirms suspicions that have been out there and shown by smaller projects on one outcome or another. This study takes a comprehensive approach and considers many parental, pediatric and societal factors simultaneously,” she adds.

This research was funded by the Social Science and Humanities Research Council of Canada.

The article, published in the Archives of Pediatrics & Adolescent Medicine, was authored by Linda S. Pagani, Caroline Fitzpatrick and Tracie A. Barnett of the Université de Montréal and its affiliated Sainte-Justine University Hospital Research Center in Canada in collaboration with Eric Dubow of the University of Michigan in the United States.

“Children need guidance and discipline; however, parents should focus on positive, non-physical forms of discipline and avoid the use of spanking,” study researcher Catherine A. Taylor, PhD, an assistant professor of community health sciences at Tulane University School of Public Health and Tropical Medicine in New Orleans, tells WebMD in an email. “This message is consistent with that of the American Academy of Pediatrics, which ‘strongly opposes striking a child for any reason.'”

Taylor and colleagues asked about 2,500 mothers how often they had spanked their 3-year-old child in the past month. Nearly half of the moms said they had not spanked their child during the previous month, 27.9% said they spanked their 3-year-old once or twice within the last month, and 26.5% percent said they spanked their child more than twice in the past month.

The researchers also asked moms questions about their child’s aggressive behavior, such as whether they were bullies, cruel, mean, destructive, and/or prone to getting into fights with others at age 3 and again at age 5.

Although other studies have shown a link between spanking and aggressive behavior, the new study solidifies the connection because the researchers controlled for other maternal risk factors that might have explained the link, such as neglect, maternal use of drugs and alcohol, maternal stress and depression, and the physical or psychological maltreatment of the child.

“This study reinforces that any kind of violence or physical aggression in the home is another risk factor for kids being more aggressive in the future,” says Patricia Hametz, MD, director of the Injury and Violence Prevention Center and assistant clinical professor of pediatrics at Columbia University and director of the general pediatrics inpatient service at New York-Presbyterian Morgan Stanley Children’s Hospital in New York City.

Age-Appropriate Discipline

“The way you discipline depends on the age of the child, and pediatricians should give age-appropriate suggestions about how to discipline toddlers,” Hametz [says]. “Some people like time-outs, which remove a child from whatever it is that is overstimulating them.”

Another tactic is to reward good behavior. “Praising, pointing out, and literally rewarding good behavior is a better discipline strategy than punishing bad behavior after it happens,” she says.

Jennifer E. Lansford, PhD, a research scientist at the Duke University Center for Child and Family Policy in Durham, N.C., agrees. “These findings suggest that spanking has the unintended consequence of increasing children’s aggressive behavior, so the implication for parents would be that they should not use corporal punishment, but find other ways of managing their children’s misbehavior and promoting good behavior,” she says in an email.

This may include teaching about good and bad behavior and trying to prevent misbehavior rather than just reacting to it once it has occurred, she suggests. “Parents can use reward systems such as sticker charts, where a child earns a sticker or something else for good behavior, and special privileges such as extra time with mom or dad can be offered for completing the sticker chart.”s

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Learning Aggressive Attitudes

The new findings make sense to child psychologist Vincent J. Barone, PhD, an associate professor of pediatrics at the University of Missouri-Kansas City School of Medicine and the director of Developmental and Behavioral Sciences South Clinic at Children’s Mercy Hospital and Clinics, also in Kansas City.

“The findings in this research are consistent with what we know about violent experiences for children. Whether a violent video game or corporal punishment, children learn aggressive attitudes and act them out when they are exposed to violence,” he says. “Children don’t learn peaceful ways of solving conflict when they are exposed to violence.”

Barone usually suggests that parents briefly describe the inappropriate behavior and then use a time-out.

Also, he suggests, “use your attention and passion to describe and praise positive behaviors such as cooperation, thoughtfulness, and respect for others.”

Early onset of sexual activity among teens may relate to the amount of adult content children were exposed to during their childhood, according to a new study released by Children’s Hospital Boston. Based on a longitudinal study tracking children from age six to eighteen, researchers found that the younger children are exposed to content intended for adults in television and movies, the earlier they become sexually active during adolescence. The findings are being presented at the Pediatric Academic Societies meetings on Monday, May 4 in Baltimore.

“Television and movies are among the leading sources of information about sex and relationships for adolescents,” says Hernan Delgado, MD, fellow in the Division of Adolescent/Young Adult Medicine at Children’s Hospital Boston and lead author of the study. “Our research shows that their sexual attitudes and expectations are influenced much earlier in life.”

The study consisted of 754 participants, 365 males and 389 females, who were tracked during two stages in life: first during childhood, and again five years later when their ages ranged from 12 to 18-years-old. At each stage, the television programs and movies viewed, and the amount of time spent watching them over a sample weekday and weekend day were logged. The program titles were used to determine what content was intended for adults. The participants’ onset of sexual activity was then tracked during the second stage.

According to the findings, when the youngest children in the sample–ages 6 to 8-years-old–were exposed to adult-targeted television and movies, they were more likely to have sex earlier when compared those who watched less adult-targeted content. The study found that for every hour the youngest group of children watched adult-targeted content over the two sample days, their chances of having sex during early adolescence increased by 33 percent. Meanwhile, the reverse was not found to be true that is, becoming sexually active in adolescence did not subsequently increase youth’s viewing of adult-targeted television and movies.

“Adult entertainment often deals with issues and challenges that adults face, including the complexities of sexual relationships. Children have neither the life experience nor the brain development to fully differentiate between a reality they are moving toward and a fiction meant solely to entertain,” adds David Bickham, PhD, staff scientist in the Center on Media and Child Health and co-author of the study. “Children learn from media, and when they watch media with sexual references and innuendos, our research suggests they are more likely to engage in sexual activity earlier in life.”

The researchers encourage parents to follow current American Academy of Pediatrics viewing guidelines such as no television in the bedroom, no more than 1 to 2 hours of screen time a day, and to co-view television programs and have an open dialogue about its content with your children. They also suggest that–while the results demonstrate a longitudinal relationship–more research needs be done to understand how media influences children’s growing awareness of human relationships and sexual behavior.

“Adolescent sexual behaviors may be influenced at a younger age, but this is just one area we studied,” adds Dr. Delgado. “We showed how adult media impacts children into adolescence, yet there are a number of other themes in adult television shows and movies, like violence and language, whose influence also needs to be tracked from childhood to adolescence.”

The study was funded by support by grants from the Maternal and Child Health Bureau and the Center on Media and Child Health.

Children’s Hospital Boston is home to the world’s largest research enterprise based at a pediatric medical center, where its discoveries have benefited both children and adults since 1869. More than 500 scientists, including eight members of the National Academy of Sciences, 11 members of the Institute of Medicine and 13 members of the Howard Hughes Medical Institute comprise Children’s research community. Founded as a 20-bed hospital for children, Children’s Hospital Boston today is a 397-bed comprehensive center for pediatric and adolescent health care grounded in the values of excellence in patient care and sensitivity to the complex needs and diversity of children and families. Children’s also is the primary pediatric teaching affiliate of Harvard Medical School.

About Peter

Peter Brown BHMS (Hons) MPsychClin MAPS

I’m a Clinical Psychologist and have a private practice and consultancy in Brisbane Australia. I have 24 years experience in child, adult and family clinical psychology. I have a wonderful wife and three kids.

I like researching issues of the brain & mind, reading and seeking out new books and resources for myself and my clients. I thought that others might be interested in some of what I have found also, hence this blog…